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Correction: First Principles Study of the Vibrational and Thermal Properties of Sn-Based Type II Clathrates CsxSn136 (0 ≤ x ≤ 24) and Rb24Ga24Sn112. Inorganics 2019, 7, 74
Open AccessArticle

“Intelligent” Pt Catalysts Based on Thin LaCoO3 Films Prepared by Atomic Layer Deposition

1
Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
2
Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
*
Author to whom correspondence should be addressed.
Inorganics 2019, 7(9), 113; https://doi.org/10.3390/inorganics7090113
Received: 13 August 2019 / Revised: 9 September 2019 / Accepted: 10 September 2019 / Published: 12 September 2019
(This article belongs to the Section Inorganic Solid-State Chemistry)
LaCoO3 films were deposited onto MgAl2O4 powders by atomic layer deposition (ALD) and then used as catalyst supports for Pt. X-ray diffraction (XRD) showed that the 0.5 nm films exhibited a perovskite structure after redox cycling at 1073 K, and scanning transmission electron microscopy and elemental mapping via energy-dispersive X-ray spectroscopy (STEM/EDS) data demonstrated that the films covered the substrate uniformly. Catalysts prepared with 3 wt % Pt showed that the Pt remained well dispersed on the perovskite film, even after repeated oxidations and reductions at 1073 K. Despite the high Pt dispersion, CO adsorption at room temperature was negligible. Compared with conventional Pt on MgAl2O4, the reduced forms of the LaCoO3-containing catalyst were highly active for the CO oxidation and water gas shift (WGS) reactions, while the oxidized catalysts showed much lower activities. Surprisingly, the reduced catalysts were much less active than the oxidized catalysts for toluene hydrogen. Catalysts prepared from thin films of Co3O4 or La2O3 exhibited properties more similar to Pt/MgAl2O4. Possible reasons for how LaCoO3 affects properties are discussed. View Full-Text
Keywords: Pt catalyst; LaCoO3; CO oxidation; water gas shift reaction; atomic layer deposition (ALD) Pt catalyst; LaCoO3; CO oxidation; water gas shift reaction; atomic layer deposition (ALD)
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MDPI and ACS Style

Mao, X.; Foucher, A.C.; Stach, E.A.; Gorte, R.J. “Intelligent” Pt Catalysts Based on Thin LaCoO3 Films Prepared by Atomic Layer Deposition. Inorganics 2019, 7, 113.

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